Two plates that are separating or pulling apart is called what

They are called a diverging or constructive plate boundary. They are called constructive as a rift opens up when they move away from each other (diverge). Letting molten rock come up, cool and form new rock/land.

Constructive plate boundary

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!